Electric-arc lamp



0. A. PPLUGER,

ELECTRIC ARC LAMP. No. 473,955. Patented May 3, 1892.

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911% 1 W 4 O J C We W UNITED STATES PATENT OFFICE.

CHARLES A. PFLUGER, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS,'TO THE STANDARD ELECTRIC ILLINOIS.

COMPANY, OF

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 473,955, dated May 3,1892.

Application filed July 16, 1890.

To all whom it may concern.-

Be it known that I, CHARLES A. PFLUGER,

a citizen of the United States, and a resident of Chicago, in the countyof Cook and State 5 of Illinois, have invented a certain new and usefulImprovement in Electric-Arc Lamps, of which the following is aspecification.

My invention relates to are lamps, and has for its object to provide acheap and simple form of regulator for are lamps.

It is illustrated in the accompanying drawing, which shows a perspectiveview of an arc lamp embodying my improvements.

A is the top of the frame containing the regulating mechanism; B, thebottom.

C Care the downward projections from the bottom plate,-which connectwith the support for the lower carbon. (Not shown herein.)

D is the upper-carbon rod.

E isthemain-circuit magnet, fixedlysecured to the upper part of the caseand having exposed below it thepivoted armature E, which is providedwith the aperture F, through which the carbon-rod passes, the link W, bywhich it is connected with the piston of the dash-pot F the spring F andthe link E whereby it supports the upperorcarbon-separating clutch G.This clutch has connected with it the rest H and the releasing-stop J,which is adj ustably supported on the rod J.

K K are the coils of a shunt-solenoid, and to their movable cores issecured the U- shaped frame L, one end of which is linked to the movablecylinder L of a dash-pot and the arms of which are pivotally connectedwith the standards M M.

N is the retracting-spring opposing the action of the solenoids upon theframe.

0 is the lower or carbon-feeding clutch, supported from the arms of thepivoted U -shaped frame by thelink P, and supported at its outer end bythe spring R. The clutch O is prolonged and at one end is in proximityto the releasing-stop S, which is pivoted on the standard S andsupported at its other end by the rod S which is attached to thearmature F of the main-circuit magnet, so that the stop S rocks on itspivot with the motion of the armatureI It will also be observed that therest II Serial No. 358.983. (N0 model.)

is on the link or arm P, and hence is movable with the motion of thepivoted frame.

T are the brushes to more effectually deliver the current to thecarbon-rod. The connections can of course be made in any convenientmanner, but are shown here in such manner that the. main-circuit magnetE is placed in the main circuit and in series with the carbons,while theshun t-magnets K, which are of higher resistance than the main-circuitmagnet, are placed in a shunt between the binding-posts of the lamp, butnot in circuit with the carbons. \Vhen the lamp is out of circuit, thecarbons are in contact, the stop S holding the clutch 0 horizontal inopposition to the spring R and the rest II holding the clutch Ghorizontal in opposition to the spring F so that neither of suchclutches engages the upper rod and the latter is free to move. When thecurrent is applied, the main circuit magnet rises, lifting the clutch Gfrom its rest II, whereupon it clamps the carbon-rod and carries it upuntil by the engagement of the other end of the clutch with the stop Jthe carbon-rod is released. The rising of the standard, however, rocksthe stop S on its pivot and permits the lower clutch C to clutch the rodand prevent it from falling down when it is released by the upperclutch. The derived-circuit solenoids then continue the feeding. Thesolenoids and m ag- 8o nets are interchangeable in this device, and thearrangement of parts, springs, dash-pots, levers, stops, &c., could belargely changed.

The use and operation of my invention are as follows: In exhibiting mylamp I have removed the cut-out, which of course would ordinarily beemployed in the usual manner,for the purpose of renderingthe action ofthe remaining parts more easily understood. The lawof the operation andthe action of the lamp will 0 be clearly understood from an inspectionof the drawing. IVhen the main-circuit electromagnet or solenoid isenergized or excited by the current passing through the lamp, the upperclutch is lifted and carries with it the up- 9 5 per-carbon rod, itbeing assumed that the two carbons are in contact at the time ofstarting and that the main-circuit magnet is in the same circuit withthe carbons. This separating of the carbons is the office of themain-circuit magnet, and the adjustment of the stops, clutch, &e., maybe such as to cause the establishment of the are by such separation. Thecontinuance of the upward motion of the upper clutch will bring its endagainst the stop, and thus will speedily throw the clutch into ahorizontal position and free it from the rod. In the meantime a portionof the current has been shunted into the derived-circuit electromagnetor solenoid, so that it is energized or excited and begins to operatethe levers or the pivoted frame connected with it. This obviouslyimparts motion to the lower clutch, which grasps the upper-carbon rodand sustains and prevents it from falling back, so as to bring the twocarbons into contact after it has been released by the upper clutch. Theshunt-magnet then continues to feed the carbons in much the usualmanner, the uppercarbon rod being permitted to slide through the clutchfrom time to time by the engagement of the lower clutch with its stop.

I have shown this device as applied to the form of lamp shown in thedrawing; but it is obvious that great variation in construction andapplication could be had without dsparting from the spirit of myinvention. I do not wish to be limited to the use of clutches alone, asother devices accomplishing substantially the same results could besubstituted for them, and the real gist of the invention consists inemploying two separate clutches, one of which is distinctively afeeding-clutch, though assuming other oflices also, and the other isdistinctively a carbon separating clutch, though it might perform otheroffices, and in actuating these clutches in any suitable manner and byany suitable mechanism. whether the same be respectivelya main and shuntmagnet, or otherwise; and, structurally considered, the lamp presentstwo constantlytraversed circuits, one including a magnet or solenoid andthe carbons, the other including a magnet or solenoid, but not thecarbons, and two clutches, which are respectively operated each by oneof said circuits.

It will be observed that this invention relates to gravity-feed arclamps, or lamps in which the feeding of the upper carbon is caused bygravity, and it will also be ob served that the entire operation is madeto depend upon the lifting-clamps, one of which lifts the carbon toestablish the arc in the first instance and the other of which lifts orrises and also falls for the purpose of maintaining the arc andpermitting the upper carbon to feed downwardly. It will also be observedthat these two clamps or clutches are independently actuated each by itsown electro-magnet or solenoid.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is as follows:

1. An arc lamp provided with two separate and distinct gravity-clutches,a main-eircuit magnet or solenoid always in circuit and working solelyupon one of such clutches, a stop to throw such clutch out of operationwhen the arc has been established by its agency, and a derived-circuitmagnet or solenoid to actuate the other clutch and regulate the are.

2. In an arc lamp, a combination of an arcestablishing device consistingof a clutch and actuating main-circuit magnet or solenoid always incircuit with an arc-regulating device consisting of a clutch andactuating derivedcircuit magnet or solenoid,each clutch auditsassociated magnet or solenoid normally inactive during the operation ofthe other clutch and its associated magnet; or solenoid.

In an arc lamp, the combination of a fixed maincircuit magnet orsolenoid always in circuit, a clutch actuated thereby, and a stop to throw such clutch out of action when the are is established, with a fixedderived-circuit magnet or solenoid, a spring-frame actuated solelythereby, and an arc-regulating clutch supported on the frame.

4-. In an arc lamp, the combination of a movable carbon support which ismoved solely by gravity toward its opposed support with two distinctdevices adapted one to separate the carbons and establish the are andthen go out of action, said device containing a main-circuit magnetalways in circuit, the other to sustain the movable supportand regulatethe are until it is again extinguished.

CHARLES vA. PFLUGER.

Witnesses:

CELESTE P. CHAPMAN, DAVIDA J. .ToHNsoN.

